Machine for expanding cylinders



Sept. 29, 1931. G. G. MCKAY MACHINE FOR EXPANDING GYLINDERS Filed July l, 1927 2 Sheets-Sheet EEHEE 5 Nc KHY Sept. 29, 1931. G. G. MCKAY 1,825,081

MACHINE FOR EXPANDING CYLINDERS Filedl July l, 1927 2 Sheets--Shee'c` 2 l l I EEUREE E MBK/W Worum Patented Sept. 29, 1931 y NTy OFFICE GEORGE G. MGKAY, or YoUNGsTowN, onmhssreivoa To THE voniro coIt'iwcrn'irive COMPANY, OF :WARBE1\T, OHIO, A CORPORATION OFOHQEV M'Acninnroit nxPANnING cYnINnERs c Application inea; Y'July i,

This invention pertains to a machine for producing annular corrugations in cylindri-l cal shipping containers, such as sheet metal drums, steel-barrels, etc., and the present machine embodies certain new and useful improvementsin the apparatusshown anddescribed in the application foripatentfiled by H. G. Vaughn, on the iirstdayoffJuly,

1927, tSerial No. 202,915 Thus, the/appa-l ratus referred to comprises separate sets of corrugating .dies arranged ycircularly and adapted to'befexpanded onradial lines to produce a pair of corrugationsf or'rolling ribs `annularly in a cylinder, one-seaofldies I being a-rrangedto slide longitudinally, that is, lparallel with the Vaxis of the cylinder, coincidently with their radialmovements, and the sliding movement beingv effected automatically by the movement or flow'of the material in contactwith the dies. The present machine -operatescorrespondingly, except that oneV set of dies is caused to slide longitudinally of the cylinder Vin a positive manner during expanding operations, the dies being engaged atone endby a followerk member and the slid-ing `movement 'being timed to the draw movement ofthe stock, all as hereinafter'more particularly described and pointed out in the claims.` In the accompanying drawings, Fig.-l-is a horizontal section, and Fig- 2 a vertical section, of a -lmachine embodying my improvement.- Figs. 3 and' 4 are' top andside views, respectively, of the same machine.

V' Fig. 5 is a sectionalfyiew of. the machine corresponding to lifiglY 2, buton a larger scale and showing thedies expanded with a-cylin-l der in place and corrugated. p A VThe machine comprises a frame-2 in which a-rotatable camshaft 3 has bearing. Sur# mounting frame 2 is a bed platel through which'a vertical shaft Alor, thrustrod gextends. VAn eccentricstrap 6v connects this rod with a cam or eccentric 7 oni-shaft 3, whereby reciprocatingv movements'V may be imparted to the rod.y Bed late 4 vischanneled radially to seat the ri bed feet 8 of'a series of upright die-carriermembers 9 arranged in a circle. Toggle links 10 connect members 9With a sleeve member 11 on verti- 192i'.A seriai No. 202,915.

ca l shaft 'or thrust rod 5. l A anged nut :12 on theV upper screw-threaded end of rod 5 supports a flanged collar ll upon which a.

seriesof compressionsprings rest, and connecting rods 1,6 extend through .these springs -andk the collar tothe upper end of sleeve' member `11. Nuts 17 on connecting rods 16 rest. upon the. springs 15, thereby supportingsleeve member :11 .yieldingly up-k on thrust rod 5. Howevenwhenthrust rod is drawn downwardly by the vcam or eccen-v tric the sleeve niemberis positivelyy actuated to straighten togglelinks 10 andl force the die-carrier Vmembers 9 ."outwardly uniform distances. von radial lines. A holding ring 18` bears against the upper ends of' diecarrier members 9, and .tie rods 19 secureV 1 tliisplate lixedly to bed plate 8.

Each die-carrier member supports two dies 20 and 21, respectively, ofsegmental form, and said dies in the present instance are ribbed transversely. lJies 20 yarelixedby screws 22 to members 9 and the ribs 23 thereon are located approximately in the saine `plane midway of the length of the die body.

Dies'21 are mounted to slide vertically upon members 9, being spaced apart from dies 20 to permit a sliding movement of `dies 21 longitudinally `toward dies 2U and each. die 211sformed..correspondingly with a transverse rib 241 near its lower end. Dies 21 containrabbeted slots k25 in which a correspondingly rabbeted'piece of metal 26 of shorter length tits, and these pieces 25 are secured byscrews 27 to holdthe dies 21 slidably in position uponf their respective members`9.

'The upper ends 28 of dies 21 extend inwardly toward 'the axis of the machine and are beveled upwardly and outwardly on top at an angle of approximately forty-ve degrees tovcorrespond with the beveled face or conical surface 29 of a cone or cam-shaped disk 30 which' is secured by bolts 31 to the upper end of sleeve member 1l. Connecting rods 16 and thrust rod 5 pass freely through the central perforated body of disk 30, which is shownkin the present `machine as interposedbetween flanged nut 12 and the' enlarged upper endfof' Asleeve member 11. 'f Re movable shims 32 are also inserted between sor sa Y

` bers 9 are forced outwardly in gradually indisk 30 and the upper end of sleeve member 11 to permit adjustment of and to time the initial contact of the cone disk in respect to the beveled ends of the sliding dies 21. Compression springs 33 are seated upon the upperends of the die-carrier members 9, and these springs press upwardly against the extensions 28 of dies 21, thereby serving to' always raise this set of dies when the cone diskris 4raised and the end pressure on the dies V21 is relieved.

At the beginning of operations, sleeve 11 and cone disk 30 are in a raised position and all the dies are contracted, that is, drawn inwardly toward the axis of the machine. Dies21 are also pressed upwardly to their limit by springs 33. VAssuming a plain sheet metal cylinder is to be voperated upon, the cylinder is rst sleeved over the circle of dies `and placed Vat rest upon the lateral extensions or ribbed feet 8 of die-carrier members 9. The machine may then be started,

and as cam oreccentric 7 makes one-half of n a revolution the thrust rod 5 and sleeve 11 and cone. 30 are drawn downwardly to gether. InY this :stroke the die-carrier memcreasing degree. as the'toggle-links move in an arc from an` inclined position to a .horiz ontal (position. The spaced ribs 23 and 24 on the dies 20 and 21, respectively are thereby brought into contact with the cylinder wall and this wall expanded circumferentially in two places simultaneously. In so doing the sheet metal body is shortened, that is, the stock draws or flows from both ends of the cylinder toward the two Zones of expansion.

Moreover the middle part of the cylinder must also be permitted to stretch or. draw longitudinally of the cylinder, otherwise this part of. thecylinder would also expand partly and be weakened or ruptured. The sliding dies 21 permit theVK dies to follow the longitudinal drawing movement of the stock in the middle area or zone of the cylinder 'asl well as the drawing movement from the upper end of the cylinder downwardlytoward the lower set of dies. But inexpanding certainkinds of stock or sheet metal of a Y given gauge it is desirable to shift the sliding dies 21 toward the dies 20 in a positive manner to divide the stresses andstrains, and cone disk 30 serves that purpose by pressing downwardly upon the beveled ends of the sliding dies 21 as they follow the drawing movement of the stock, thereby relieving the middle area of the cylinder of excessive stretching strains while permitting two relatively deep corrugations for rolling ribs a-a to be made simultaneously at widely spaced intervals in the cylinder. In this expanding operation, as cone diskBO moves downwardly the sliding dies-21 move outwardly on radial lines, but the angle of inl clination where the cone contacts with the dies is such that longitudinal pressure is constantly applied to the'dies by the cone disk during the movements of the parts at right angles. The outward pressure exerted by the lcone on the sliding dies also relieves the dies of bind against the carrier members so that they slide freelyduring expanding operations. Vhen the corrugating operation is finished the last half revolution of the cam or eccentric collapses the Vdie carrying members, that is, vrestores them to their starting position, and the corrugated cylinder may be removed to permit a repetition of operations on another plain cylinder.

What'I claim, is:

1. A machine for expanding cylinders, comprising aset of rigid expanding dies, means arranged to move said dies simultaneously on radial lines in respect to the axis of a cylinder, and means arranged to move said dies longitudinally in respect to the axis of the cylinder concurrently with their radial movement.

2. A machine for expanding cylinders, comprising a set Lof rigid radially-arranged and radially shiftablek corrugating dies, means adapted to shift said dies simultaneously on radial lines to expand a sheet metal cylinder, and a follower member adapted to forcibly shift said dies longitudinally of the cylinder during their outward movements radially of the cylinder.

3. A machine for expanding cylinders, comprising separate sets of radially arrangedy and radially .shiftable rigid corrugating dies, means adapted to shift both sets of `dies simultaneously on radio lines within a sheet metal cylinder, and means acting positively on one set of dies to reciprocate the same in limited degree lengthwise of the cylinder during radial movements of both sets of dies.

4. A machine for expanding cylinders, comprising separate sets of dies adapted to corrugate a sheet metal cylinder circumferentially in a plurality of places, means adapted to force kboth sets of dies outwardly on radial lines, andV a beveled member adapted to shift one set of said vdies lengthwise of the cylinder conincidently with the expanding movements of said dies.

5. A machine for expanding cylinders, comprising radially-arranged members, separate sets of corrugating Vdies secured to said members, one set of'dies being mounted to slide toward the other set` of dies and yieldingly supported apart'therefrom by springs, toggle link mechanismV adapted to distend said members and dies on radial lines, and a cone follower member adapted to force said slidable set of dies toward the other set of dies coincidently with the expanding movements of said dies.

6. A machine for expanding cylinders, comprising azset of radially-arranged members, a reciprocable device in toggle connection with saidk members, a set of dies mounted slidably upon said members having beveled extremities, and a cone fixed adjust` ably to said reciprocabler device adapted to bear against the beveled extremities of said dies and impart a slidable movement thereto coincidently With the expanding movements` of said dies. y y Y 7 machine for expanding cylinders, comprising expanding dies adapted toy form an annular corrugation in a cylinder,`

means adapted to shift said dies longitudi# nally ofthe cylinder coincident With the expansion movements thereof, and means adapted to adjustably fix the Working relations of the said means to said dies.

8. A machine for expanding cylinders, comprising separate sets of corrugating dies, means adapted to expand said dies on radial lines, one set ofdies being movable length- Wise `of the cylinder, and adjustable means A adapted to shift said movable dies length- Wise of the cylinder coincident With their radial movements. Y

9. A machine for expanding. cylinders,

comprising rigid radially shiftable expanding means adapted to form a plurality of annular corrugations in the Wall of a sheet metal cylinder, and mechanism to positively` shift said corrugating means lengthwise of the cylinder during corrugating operations and shortening movements of the cylinder.

10. A machine for expanding cylinders, comprising rigid radially shiftable expanding means adapted to produce annular corrugations at tWoplaces simultaneously in a Y sheet metal cylinder, said means including rigid corrugating devices `movable vlength- Wise of the cylinder and mechanism adapted to force said devices lengthwise of the c cylinder concurrently With the corrugating operation and the flow of thestock.

In testimony Whereo'f I affix my signature.

GEORGE e. Menu. A 

